Differential railway-axle.



B. R. SEABROOK.

DIFFERENTIAL RAILWAY AXLE.

APPLICATION FILED JAN.26,1912. RENEWED FEB.10,1913.

1,072,045, Patented Sept. 2, 1913.

7 7 may,

UNITED STATES PATENT OFFICE.

RAesTE'R RoAns sEARRooK, or TORONTO, ONTA IO, CANADA, ASSIGNOR To THE SEABROOK-BOX DIFFERENTIAL RAILWAY AXLE COMPANY, or LOS ANGELES, cALr- FORNIA, A ooRPoRATIoN or ARIZONA.

DIFFERENTIAL RAILWAY-AXLE.

Specification of Letters Patent.

Patented Sept. 2, 1913] Application filed January 26, 1912, Serial No. 673,561. Renewed February 10, 1913. Serial No. 747,565.

To all whom it may concern:

Be it known that I, BAGSTER R. SEAnnooK, of the city of Toronto, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Differential Railway-Axles, of which the following is a specification.

This invention relates to differential railway axles of the type shown and described in Canadian Patent No. 115,910, dated December 27th, 1908, in which two parts of a divided axle were secured together by means of a sleeve or box formed of telescopic parts secured together by frictional engagement between the parts, and my obj ect is to devise a specific construct-ion which will facilitate manufacture and enable the device to be made with great accuracy and with less trouble than was possible with the older construction.

In the prior construction a seat was formed within the outer part of the connecting sleeve against which a retaining ring on the opposed part abutted. This necessitated the outer part of the sleeve being made of a'heavy piece requiring a lot of time and labor in turning to shape while the seat being on the inside much difficulty was experienced in turning the sleeve true to the small fraction of an inch which the necessities of the case demanded. I now form the outer part of the sleeve from a piece of seamless or forged tube and employ a separate seat which is readily turned up accurately to the desired shape and placed in position within the outer part of the sleeve.

Figure 1 is a longitudinal side elevation, partly in section, of my improved axle. Fig. 2 is a longitudinal section in an enlarged scale of the movable seat. Fig. 3 is a front elevation of the same.

In the drawings like letters of reference indicate corresponding parts in the different figures.

The axle is formed in two parts, 2 and 2" which are secured together by means of a coupling device formed of telescope sleeves 4: and 6. The sleeve 4 is secured upon the inner part of the portion 2 of the axle by being forced thereon by hydraulic or other pressure to form a tight frictional fit. The inner end of the part 2 of the axle has a retaining ring 5 secured thereon. This is preferably done by turning down the inner end of the part of the axle, forcing thereon the retaining ring to give it a tight frictional engagement therewith. The end of the turned down portion of the axle preferably projects slightly through the ring and is upset to increase the security of the engagement between the retaining ring and the part of the axle. The outer sleeve 4: is turned up from a piece of seamless or forged tubing and a slight shoulder 20 is formed therein facing toward the part 2 of the axle.

21 is a seat turned to fit the shoulder 20 and to form a portion 22 fitting within the smaller bore of the sleeve 4. This seat is bored out to fit the reduced end 11 of the part 2 of the axle. This seat is preferably driven into place by hydraulic or other pres sure, so that it fits tightly in place with a frictional engagement which prevents it from turning when the axle is in use. The inner sleeve 6 is also formed from seamless or forged tubing and when the axle is in use forms a journal box for the part 2" of the axle and is preferably provided with rings 23 of anti-friction metal the purpose of which, however, has no immediate connection with the present invention. The outer surface of the seat 21 has the holes 16 formed therein to contain a lubricant, which are preferably arranged as shown in Fig. 3. Similar holes are also formed in the inner end of the sleeve 6. The other arrangements for lubricating form no part of the present invention and are, therefore, not particularly described. They may, however, be arranged as in the prior patent, hereinbefore referred to, or in other patents issued to me subsequent thereto.

The axle is assembled in the following manner: The sleeve 4 is driven in place on the part 2 of the axle herein before described and the seat 21 driven in place. The sleeve 0 is placed in position on the part 2 of the axle and the retaining ring 5 secured in place as hereinbefore described. The sleeve 6 is then forced within the sleeve 4 by hydraulicor other pressure so as to have a frictional engagement therewith which absolutely prevents the parts separating unless forced apart by hydraulic means, as described in my prior Canadian Patent No. 120,509, dated June 21, 1910. It will be found that when the device is constructed with the movable seat 21, as hereinbefore described, that the objects of my invention as set out in the preamble to this specification can be fully attained.

What I claim as my invention is 1. In a differential axle, the combination of a divided axle, a coupling comprising two telescoped sleeves secured together, one sleeve being secured to one part of the axle and the other forming a bearing box for the other partof the axle, a retaining ring secured upon the last mentioned part of the axle, and a separate seat fitted within the first mentioned sleeve and forming a thrust bearing for the retaining ring.

2. A coupling for a differential axle comprising a divided axle two telescoped sleeves, the outer sleeve being counterbored to form an internal shoulder, a separate annular seat fitted within said sleeve against the shoulder, one axle member being fixed to one sleeve, the other axle member being rotatable in the other sleeve, the first axle member having a reduced end fitting within said separate annular seat. 7 Y

3. A coupling for a difi'erential axle comprising a divided axle two telescoped sleeves the outer sleeve being counterbored to form an internal shoulder, a separate annular seat fitted within said sleeve against the shoulder, said seat being formed with two external diameters one of which fits Within the larger 'in the other-sleeve.

4:. A coupling for a differential axle comprising two telescoped sleeves turned from seamless tubing, the outer sleeve being counterbored to form an internal shoulder, and an annular separate seat having two external diameters the smaller of which is fitted within said sleeve against the shoulder. I I L 5. In a differential axlethe combination of a divided axle, a coupling comprising two telescoped sleeves secured together, one sleeve being secured to one part of the axle and the other forming a bearing box for the other part of the axle; aretaining ring secured upon the last mentioned part of the axle, and a separate seat fitted within the '55 Y first mentioned sleeve and forming a thrust bearing for the retaining ring, the said seat being bored out to receive the end of the firstmentioned part ofthe axle'which end is turned down to fit the opening inthe seat.

'In testimony whereof, I have; hereunto set my hand at Toronto, 24th day of January, 1912.

In presence of J. EDW. MAYBEE, E. P. HALL.

BAGSTER noAnssEABRoon. r

Copies of this patent may be obtained for five cents each, by addressing the Gominissioner :of Patents,

Washington, D. G. v v V 

